Doorcheck



H. E. GIFFORD DGORCHECK 2 Sheets-Sheet Filed Got. 5. 1.924

Patent-capte 15, 1.925.

y UNITDV.STATES- PATENT oFFlcE.

HARRY E. GIFFORD, OIE MEDFORD, 'MASSACHUSETTS DooRCHEoK.

Application lcd October 8, 1924. Serial'No. 742,475.

and useful Improvements inr Doorchecks, of which the following is a speclficatlon.

Myinvention relates to lmprovements 1n doorv checks vof the type used in keeping '-10 screen doors c sed, thereby eliminating the necessity'of a atch.

' The 'objectief my invention is to supply a door check which permits the door to close easily yet requiring considerable. force to open the door;` to give a simple y'et strong construction; 'to supply a striking-plate for the door toreceive thewear of the latchbolt of thedtmrfcheck.

I am aware that there are ydoor checks having one xspring of strong'resist'ance which must be overcome in both opening and clos ing the door.` Such door checks prevent thc door from .closing in many instances unless much force is 'exerted in .the closing, or the door lis closed with. a long strong swing. It such force is not exerted, the door remains partially open restilig against the door check, permitting the entrance of fiies and other insectsi;A lily door check eliminates this objection, also extends the life of the door check by distributing the wear from one spring to several.

` I attain Vmy object by the construction illustrated in the accompanying drawings, in which-,-

Figure 1, is aside view of my door check; the latch-bolt and its spring and manipulator being shownin dotted lines.

Figure 2iswa top view ot: my door check showing spiatgs .on either side oi the cas- 'liigurc l3,15 :i view 'ol" my door check inA the position it assumes when the door is opened, the latchsbolt engaging the strik ing-plate on the door. 1,.;

Figure 4, is :tgvplan view ot the strikingplate. 1,

Figure 5, is a 4side view ot' a modification of my device with the casing spring located within the casing and shown in dotted line. Figure 6, is-a top view of Figure 5 with State of Massachusetts, have invented newv the top of the casing,` Figure 5, broken away atzline ari-00. v

Figure 7, is 'an end lview of the casing showing its formation.

Figure 8, illustrates a y further modification of my devlce.

Similar numerals refer to similar parts throughout the several views. 4

1 is the base-plate of the door check hav ing two lugs 2-2 to which is pivoted the casing 5; base-plate 1 has ears 3-3 .through Which are passed screw-eyes 4-4 for securing the door check to the door casing, and to receive the ends of springs 10-10; 6 6 are rivets by means of which the base-'plate is pivoted to the casing 5; 7 7 arey ears extending at right angle from the upper por- `tion of casing 5, and are perforated to receive ends 11-11 of springs 10-10: 8 is the latch-bolt n'ianipulator which is pivoted in the casing 5 by rivet 9; 10-10 are strong springs located at each side of casing 5 and supply a strong resistance when the door is opened; 'i1-11 are ends ot springs 10-10 engaging ears 7-7; 12-12 are eyes of screw-eyes llt- 4 whichengage the other ends of springs 10-10; 13 is the latclrbolt which the door engages when 'it is opened, and has side extensions 14-14 on either side which are engaged by the recesses 253-23 in the manipulator 8, and carries a spindle 15 upon which is assembled a spring of light resistancev 17; the tree end of spindle 15 passes through the back lng 24 of the casing 5, and is then riveted or spread as shown by 16;

ldot-ted line 18 locates the back of the casing 5; 19 is the striking-plate which is oblong to permit its use upon more than one thickness of door; 2O 1s the. screw hole 1n plate 1t): 2l

the odge of door to which plate 19 is attached.

tuting the two outside springs 10-10;

10"-10 shows another type of spring for' manipulating casing 5 onel end` resting on the base-plate 1, then engaging rivetsG- and extending to and engaging casing 5 -u ahicn im ietch-bolt 413 and pushes the door cheoirv is another shape for casing Figure 5; the h ne :wwe-Indicates where the casing 5 has eeen cut away as shown 1n Figure 6.

if'. fn operation, i secure they baSe-plate'to the door casing with screw-eyes as in Figurel, l .f

jnrscrews as in Figure 5 as the case may be; then recess the edge of the door to receive "the strikingpiato----19 in `line with latchbolt. w. i

v When the door is opened the plate engages eway from .the door casing, pivoting the casing 5 et l6, exercising the strong sprin 10 or When the .door closes, the door c ieck .havin returned to its former position, at reet, tv e striking-plate engages the latch-bolt 'l manipulator 8 whichrocks inwardly forcing tiieatch-bolt beck Within casing 5, and exercising spring' 17 of light resistance.

-The construction of mydoor check is suc-h that the opening of the door does not cause the latch-bolt to change its position- Within the casing 5.

In the drawing the casing 5 is show n struck from sheet metal, but as this casing may be-o various designs, one of which 'is vshown. in Figure 8, and still not depart from the scope of my inventioml do not claim a 4; definite pattern for the same. My invention W depends more upon the relative position of v member for closing said casing, aletch-bolt with a light spring Within said casing, and

a striking plate.

2.- A. door check comprising e, base-plate;

a casing member pivoted upon said baseplate, and having a strongspring engaging seid casing and base-plate; rz,.1a tch-bolt within said casing member retaining itin extended position by a spring of light resistance.

3. A door check comprising :ibase-plete; a casing member pivoted upon saidbeseplate, and having a strong spring for closing it upon the base-plete; e .latch-bolt zWithin said casing member retaining it in extended position by a spring` of light iesistence` and a bolt manipulator to assist in thie easy action of the latch-bolt. y

In testimony whereof l have afiixedniy signature.

HARRY E. GIFFORD. 

